Information Retrieval Research1st Edition - January 1, 1981Latest editionEditors: S. E. Robertson, C. J. van Rijsbergen, R. N. OddyLanguage: EnglishPurchase optionsSorry, this title is not available for purchase in your country/region.Product detailsEdition: 1Latest editionPublished: January 1, 1981Language: Englishproduct